Most astrophysicists accept that this is the case, since according to general relativity, any concentration of matter of sufficient density must necessarily collapse into a black hole.
大多数天体物理学家接受这个情形，自从依照广义相对论，充份密度物质任何集中一定必然坍缩为一个黑洞。
2
The results show that CO2 transfer rate increases with increasing electrical current density and CO2 concentration difference across the membrane.
解的结果表明： 影响CO2 传质通量的因素主要有电流密度及CO2在膜两侧的浓度差。
3
In general, the Lord salt concentration, temperature increase coating, and under the condition of mixing, can allow the more current density.